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GET /api/1.1/patches/2227708/?format=api
{ "id": 2227708, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2227708/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260424054742.45832-6-mkchauras@gmail.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/1.1/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/" }, "msgid": "<20260424054742.45832-6-mkchauras@gmail.com>", "date": "2026-04-24T05:47:40", "name": "[V13,5/7] rust: Make __udivdi3() and __umoddi3() panic", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "bac85ffb606b7053a0f48d73d160b9aa62b8a6f7", "submitter": { "id": 92575, "url": "http://patchwork.ozlabs.org/api/1.1/people/92575/?format=api", "name": "Mukesh Kumar Chaurasiya", "email": "mkchauras@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260424054742.45832-6-mkchauras@gmail.com/mbox/", "series": [ { "id": 501303, "url": "http://patchwork.ozlabs.org/api/1.1/series/501303/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=501303", "date": "2026-04-24T05:47:35", "name": "Rust support for powerpc", "version": 13, "mbox": "http://patchwork.ozlabs.org/series/501303/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2227708/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2227708/checks/", "tags": {}, "headers": { "Return-Path": "\n <linuxppc-dev+bounces-20039-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=GNY2ubdj;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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charset=UTF-8", "Content-Transfer-Encoding": "8bit", "X-Spam-Status": "No, score=-0.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tDKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,\n\tSPF_HELO_NONE,SPF_PASS autolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "From: Link Mauve <linkmauve@linkmauve.fr>\n\nThe core crate currently depends on these two functions for i64/u64/\ni128/u128/core::time::Duration formatting, but we shouldn’t use that in\nthe kernel so let’s panic if they are ever called.\n\nThis doesn’t yet fix drm_panic_qr.rs, which also uses __udivdi3 when\nCONFIG_CC_OPTIMIZE_FOR_SIZE=y, but at least makes the rest of the kernel\nbuild on PPC32.\n\nSigned-off-by: Link Mauve <linkmauve@linkmauve.fr>\nSigned-off-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>\n---\n rust/Makefile | 4 ++++\n rust/compiler_builtins.rs | 6 ++++++\n 2 files changed, 10 insertions(+)", "diff": "diff --git a/rust/Makefile b/rust/Makefile\nindex 2a5428a5503d..ee11fba7a03d 100644\n--- a/rust/Makefile\n+++ b/rust/Makefile\n@@ -616,6 +616,10 @@ ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),)\n \t\t__ashrti3 \\\n \t\t__ashlti3 __lshrti3\n endif\n+ifdef CONFIG_PPC32\n+\tredirect-intrinsics += \\\n+\t\t__udivdi3 __umoddi3\n+endif\n \n ifdef CONFIG_MODVERSIONS\n cmd_gendwarfksyms = $(if $(skip_gendwarfksyms),, \\\ndiff --git a/rust/compiler_builtins.rs b/rust/compiler_builtins.rs\nindex dd16c1dc899c..fc6b54636dd5 100644\n--- a/rust/compiler_builtins.rs\n+++ b/rust/compiler_builtins.rs\n@@ -97,5 +97,11 @@ pub extern \"C\" fn $ident() {\n __aeabi_uldivmod,\n });\n \n+#[cfg(target_arch = \"powerpc\")]\n+define_panicking_intrinsics!(\"`u64` division/modulo should not be used\", {\n+ __udivdi3,\n+ __umoddi3,\n+});\n+\n // NOTE: if you are adding a new intrinsic here, you should also add it to\n // `redirect-intrinsics` in `rust/Makefile`.\n", "prefixes": [ "V13", "5/7" ] }